549297997 has 2 divisors, whose sum is σ = 549297998. Its totient is φ = 549297996.

The previous prime is 549297971. The next prime is 549298027. The reversal of 549297997 is 799792945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345550921 + 203747076 = 18589^2 + 14274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549297997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (549297907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274648998 + 274648999.

It is an arithmetic number, because the mean of its divisors is an integer number (274648999).

Almost surely, 2^549297997 is an apocalyptic number.

It is an amenable number.

549297997 is a deficient number, since it is larger than the sum of its proper divisors (1).

549297997 is an equidigital number, since it uses as much as digits as its factorization.

549297997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12859560, while the sum is 61.

The square root of 549297997 is about 23437.1072660429. The cubic root of 549297997 is about 818.9725367391.

It can be divided in two parts, 54929 and 7997, that added together give a palindrome (62926).

The spelling of 549297997 in words is "five hundred forty-nine million, two hundred ninety-seven thousand, nine hundred ninety-seven".